[PATCH] libata: convert pio_task and packet_task to port_task

Make pio_task and atapi_packet_task use port_task.
atapi_packet_task() is moved upward such that it's right after
ata_pio_task().  This position is more natural and makes adding
prototype for ata_qc_issue_prot() unnecessary.

Signed-off-by: Tejun Heo <htejun@gmail.com>
Signed-off-by: Jeff Garzik <jeff@garzik.org>

diff --git a/drivers/scsi/libata-core.c b/drivers/scsi/libata-core.c
index d59d462..16a108d 100644 (file)
--- a/drivers/scsi/libata-core.c
+++ b/drivers/scsi/libata-core.c
@@ -3709,11 +3709,83 @@ fsm_start:
        }
 
        if (timeout)
-               ata_queue_delayed_pio_task(ap, timeout);
+               ata_port_queue_task(ap, ata_pio_task, ap, timeout);
        else if (!qc_completed)
                goto fsm_start;
 }
 
+/**
+ *     atapi_packet_task - Write CDB bytes to hardware
+ *     @_data: Port to which ATAPI device is attached.
+ *
+ *     When device has indicated its readiness to accept
+ *     a CDB, this function is called.  Send the CDB.
+ *     If DMA is to be performed, exit immediately.
+ *     Otherwise, we are in polling mode, so poll
+ *     status under operation succeeds or fails.
+ *
+ *     LOCKING:
+ *     Kernel thread context (may sleep)
+ */
+
+static void atapi_packet_task(void *_data)
+{
+       struct ata_port *ap = _data;
+       struct ata_queued_cmd *qc;
+       u8 status;
+
+       qc = ata_qc_from_tag(ap, ap->active_tag);
+       WARN_ON(qc == NULL);
+       WARN_ON(!(qc->flags & ATA_QCFLAG_ACTIVE));
+
+       /* sleep-wait for BSY to clear */
+       DPRINTK("busy wait\n");
+       if (ata_busy_sleep(ap, ATA_TMOUT_CDB_QUICK, ATA_TMOUT_CDB)) {
+               qc->err_mask |= AC_ERR_TIMEOUT;
+               goto err_out;
+       }
+
+       /* make sure DRQ is set */
+       status = ata_chk_status(ap);
+       if ((status & (ATA_BUSY | ATA_DRQ)) != ATA_DRQ) {
+               qc->err_mask |= AC_ERR_HSM;
+               goto err_out;
+       }
+
+       /* send SCSI cdb */
+       DPRINTK("send cdb\n");
+       WARN_ON(qc->dev->cdb_len < 12);
+
+       if (qc->tf.protocol == ATA_PROT_ATAPI_DMA ||
+           qc->tf.protocol == ATA_PROT_ATAPI_NODATA) {
+               unsigned long flags;
+
+               /* Once we're done issuing command and kicking bmdma,
+                * irq handler takes over.  To not lose irq, we need
+                * to clear NOINTR flag before sending cdb, but
+                * interrupt handler shouldn't be invoked before we're
+                * finished.  Hence, the following locking.
+                */
+               spin_lock_irqsave(&ap->host_set->lock, flags);
+               ap->flags &= ~ATA_FLAG_NOINTR;
+               ata_data_xfer(ap, qc->cdb, qc->dev->cdb_len, 1);
+               if (qc->tf.protocol == ATA_PROT_ATAPI_DMA)
+                       ap->ops->bmdma_start(qc);       /* initiate bmdma */
+               spin_unlock_irqrestore(&ap->host_set->lock, flags);
+       } else {
+               ata_data_xfer(ap, qc->cdb, qc->dev->cdb_len, 1);
+
+               /* PIO commands are handled by polling */
+               ap->hsm_task_state = HSM_ST;
+               ata_port_queue_task(ap, ata_pio_task, ap, 0);
+       }
+
+       return;
+
+err_out:
+       ata_poll_qc_complete(qc);
+}
+
 /**
  *     ata_qc_timeout - Handle timeout of queued command
  *     @qc: Command that timed out
@@ -4013,26 +4085,26 @@ unsigned int ata_qc_issue_prot(struct ata_queued_cmd *qc)
                ata_qc_set_polling(qc);
                ata_tf_to_host(ap, &qc->tf);
                ap->hsm_task_state = HSM_ST;
-               ata_queue_pio_task(ap);
+               ata_port_queue_task(ap, ata_pio_task, ap, 0);
                break;
 
        case ATA_PROT_ATAPI:
                ata_qc_set_polling(qc);
                ata_tf_to_host(ap, &qc->tf);
-               ata_queue_packet_task(ap);
+               ata_port_queue_task(ap, atapi_packet_task, ap, 0);
                break;
 
        case ATA_PROT_ATAPI_NODATA:
                ap->flags |= ATA_FLAG_NOINTR;
                ata_tf_to_host(ap, &qc->tf);
-               ata_queue_packet_task(ap);
+               ata_port_queue_task(ap, atapi_packet_task, ap, 0);
                break;
 
        case ATA_PROT_ATAPI_DMA:
                ap->flags |= ATA_FLAG_NOINTR;
                ap->ops->tf_load(ap, &qc->tf);   /* load tf registers */
                ap->ops->bmdma_setup(qc);           /* set up bmdma */
-               ata_queue_packet_task(ap);
+               ata_port_queue_task(ap, atapi_packet_task, ap, 0);
                break;
 
        default:
@@ -4400,78 +4472,6 @@ irqreturn_t ata_interrupt (int irq, void *dev_instance, struct pt_regs *regs)
        return IRQ_RETVAL(handled);
 }
 
-/**
- *     atapi_packet_task - Write CDB bytes to hardware
- *     @_data: Port to which ATAPI device is attached.
- *
- *     When device has indicated its readiness to accept
- *     a CDB, this function is called.  Send the CDB.
- *     If DMA is to be performed, exit immediately.
- *     Otherwise, we are in polling mode, so poll
- *     status under operation succeeds or fails.
- *
- *     LOCKING:
- *     Kernel thread context (may sleep)
- */
-
-static void atapi_packet_task(void *_data)
-{
-       struct ata_port *ap = _data;
-       struct ata_queued_cmd *qc;
-       u8 status;
-
-       qc = ata_qc_from_tag(ap, ap->active_tag);
-       WARN_ON(qc == NULL);
-       WARN_ON(!(qc->flags & ATA_QCFLAG_ACTIVE));
-
-       /* sleep-wait for BSY to clear */
-       DPRINTK("busy wait\n");
-       if (ata_busy_sleep(ap, ATA_TMOUT_CDB_QUICK, ATA_TMOUT_CDB)) {
-               qc->err_mask |= AC_ERR_TIMEOUT;
-               goto err_out;
-       }
-
-       /* make sure DRQ is set */
-       status = ata_chk_status(ap);
-       if ((status & (ATA_BUSY | ATA_DRQ)) != ATA_DRQ) {
-               qc->err_mask |= AC_ERR_HSM;
-               goto err_out;
-       }
-
-       /* send SCSI cdb */
-       DPRINTK("send cdb\n");
-       WARN_ON(qc->dev->cdb_len < 12);
-
-       if (qc->tf.protocol == ATA_PROT_ATAPI_DMA ||
-           qc->tf.protocol == ATA_PROT_ATAPI_NODATA) {
-               unsigned long flags;
-
-               /* Once we're done issuing command and kicking bmdma,
-                * irq handler takes over.  To not lose irq, we need
-                * to clear NOINTR flag before sending cdb, but
-                * interrupt handler shouldn't be invoked before we're
-                * finished.  Hence, the following locking.
-                */
-               spin_lock_irqsave(&ap->host_set->lock, flags);
-               ap->flags &= ~ATA_FLAG_NOINTR;
-               ata_data_xfer(ap, qc->cdb, qc->dev->cdb_len, 1);
-               if (qc->tf.protocol == ATA_PROT_ATAPI_DMA)
-                       ap->ops->bmdma_start(qc);       /* initiate bmdma */
-               spin_unlock_irqrestore(&ap->host_set->lock, flags);
-       } else {
-               ata_data_xfer(ap, qc->cdb, qc->dev->cdb_len, 1);
-
-               /* PIO commands are handled by polling */
-               ap->hsm_task_state = HSM_ST;
-               ata_queue_pio_task(ap);
-       }
-
-       return;
-
-err_out:
-       ata_poll_qc_complete(qc);
-}
-
 
 /*
  * Execute a 'simple' command, that only consists of the opcode 'cmd' itself,